On certain forms, possibly only in combination with certain other elements, pressing enter in expected locations is no longer submitting the form, but instead changing focus to another field.
Reports from enwiki : https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&oldid=877878700#Hitting_%22enter%22_in_the_edit_summary_box_no_longer_saves_the_page
Able to reproduce on testwiki with the MOVE dialog:
- Go to a page
- Attempt to move it
- Enter new title and reason, press ENTER in the REASON field
- FAIL: Instead of submitting, the input focus is changing to the namespace selector
Possibly related to T213240 ?